What should be checked to verify the functionality of a pencil?

• A. Its weight only
• B. Its ability to write and be erased on various surfaces
• C. Only the color of the pencil's paint
• D. Only the length of the pencil

Answer: (B)

To verify the functionality of a pencil, it is essential to assess its ability to both write and be erased on various surfaces. This is the primary purpose of the pencil, and evaluating these aspects ensures that it performs as intended in practical applications. A pencil needs to produce a consistent line when writing, and the ability to erase that line effectively is crucial for users who require the freedom to correct mistakes. Moreover, testing across various surfaces is important because different papers or materials can affect writing quality and erasure capability.

Evaluating only its weight, color, or length does not directly assess its performance as a writing instrument. While these characteristics may provide some aesthetic or ergonomic considerations, they do not determine its core functionality. Thus, checking the pencil's writing and erasing abilities is the most appropriate way to confirm its usability.